numpy.genfromtxt(fname, dtype=<class‘float’>, comments=’#’, delimiter=None, skip_header=0, skip_footer=0, converters=None, missing_values=None, filling_values=None, usecols=None, names=None, exc

1、sign()函数功能介绍sign()是Python的Numpy中的取数字符号（数字前的正负号）的函数。2、sign()函数用法代码演示import numpy as np#输入数据arr = [-0.2,-1.1,0,2.3,4.5,0.0]arr[-0.2, -1.1, 0, 2.3, 4.5, 0.0]signResult = np.sign(arr)signResultarray([-1